Class "big.matrix.descriptor"
An object of this class contains necessary and sufficient information
to “attach” a shared or filebacked big.matrix.
## S4 method for signature 'big.matrix.descriptor' sub.big.matrix( x, firstRow = 1, lastRow = NULL, firstCol = 1, lastCol = NULL, backingpath = NULL ) ## S4 method for signature 'character' attach.resource(obj, ...) ## S4 method for signature 'big.matrix.descriptor' attach.resource(obj, ...)
x |
A descriptor object |
firstRow |
the first row of the submatrix |
lastRow |
the last row of the submatrix if not NULL |
firstCol |
the first column of the submatrix |
lastCol |
of the submatrix if not NULL |
backingpath |
required path to the filebacked object, if applicable |
obj |
The filename of the descriptor for a filebacked matrix, assumed to be in the directory specified |
... |
possibly |
Objects should not be created by calls of the form new("big.matrix.descriptor", ...),
but should use the describe function.
description:Object of class "list"; details omitted.
Class "descriptor", directly.
signature(obj = "big.matrix.descriptor"): ...
signature(x = "big.matrix.descriptor"): ...
We provide attach.resource for convenience, but expect most users
will prefer attach.big.matrix.
John W. Emerson and Michael J. Kane
Other types of descriptors are defined in package synchronicity.
See also attach.big.matrix.
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